Reamer



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BEAMER Filed Jan. '21 vi921- Enum-umu Mums wlwzms cuaP rw 2 Sheetssheez 1 l miam? y il' .ef Aorny UNITEDPSTA Patented lpr. 22, 1924.

ANTON vM. VEDOE, 0F QUINCY, MASSACHUSETTS.

Applicationlled January 4$21, 19.21. Serial. No. 439,016.

To', all whomvc't may concern.:-

zBe it known that I, ANTON M. VnDoE, a

subject`- of thefKing of Sweden,'residing atv Quincy, in theeounty of Norfolk and State, 'of Massachusetts', vhave invented an- Imrovement`\ in Rea-mers, ofwhich the fol-l nowing. description, `iin connection with the accompanying drawings, is a-specication, like characters `on the drawings representing like parts. Y

Thls invention relatesto reamers, andl operation, since the force exerted upon an Y end of the reamer to turn the same often tends to cantthereamerdn the hole belng roamed. i

The primary object of the present invention, therefore, is tov provide attachments for reamers that will'maintain the reamers in the desired position of alignment throughout the reaming operation; and the attachments are designed more particularly for reamers usedy in reaming out aligned holes'or bearings. j l

In various mechanical constructions it is desired to provide spaced journal boxes or bearings that are aligned, and are reamed accurately to size throughout the bearing seats. The present invention contemplatesA utilizing one of the spaced bearings to hold the reamer in proper position of alignment while the other bearing or bearings are being reamed. ,l 'l ,f

r1`he reamer attachments arepreferably so constructedvthat they'may be readily .ap-

plied to reamers heretofore manufactured,

' but obviously reamers maybe manufactured having certain features ofy the present inventionembodied therein as an integral part of the reamer.

vention will be clear/from the following description in connection with the accompanying drawings which show one good practical form of the inventiom v f In the drawings: .f

Fig. lis a side view of a type'of reamer heretofore used;

Fig. 2 is a sectional view through the reamer of Fig,v 1; v

Figa 3, 4 and 5 are/side views of attachments for the reamer shown vin Fig. l, the pats5 ybeing shown/disassembled in Figs. 4 an Y 6 is an end view of a split sleeve;

U Flg. 7 is a side view, ofthe reamer show- 1ng the luse of one attachment therefor; and

.n ,Fig 8 is a side View of the reamer showifng the use of another attachment there'- The reamer'attachments forming the subject-matter of this invention may bevariously constructed and ma be appliedto different types of reamer, ut it is, herein illustrated asapplied to a well known type of expansible reamer designated inits en- ;tirety by 10 and best shown in Fig. 1.

The reamer 10 is shown as provided with a cylindrical body portion 11, at the opposite ends of which are provided the threaded portions 12 and 13, and slots are formed 'ES' PATENT ormoni y ilongitudinally of said portions to receive the kadjustable reamer bladesll. l The bottom of the slots areusually tapered slightly and the cooperating ed el of the blades are correspondingly' tapere to eifect expansion of the bladesl upon adjusting them longitudinally of the' body. The blades are shown as adjustably secured in place in a ywell known manner by the nuts 15 and'lG,

each having an end undercut to receive the correspondingly shaped ends ofthe blades 14.` The reamer 10 1s shown as having thev `usual shank 17. f l

The construction of the reamer attachments may be varied in accordance with the different types of reamersiwith which it is to be used, and also to meet the different conditions under which it maybe used, and it may be desirable under some. conditions to provide the reamer with means at its forward end to guide the same in its re'aming operation, 'while under other conditions it may be desirable to guide the reamer from l f fa position' to the rear of its cutting sur- The above and other features of the face. Accor-din ly, in Fig. 7 the reamer is shown as guide into the hole to be reamed from a position in front of the cutting portion of the reamer, while in Fig. 8 the reamer is shown as entering one hole while it is guided from a second hole to the rear of the cutting portion of the reamer.

One of the uses for -which the present invention is well adapted is in connection with the piston of an internal comics l bustion engine 4to Aream out the bushings in which the'wristpin 'for the crank shaft is journaled.` In Fig. 7 a well known type- V1li '.Viding an vexpansible sleeve 21 within the left hand bushing 2O of Fig. 7 which acts throughfthe extension 22 to guide lthe reamer. This construction maintains the reamer in the desired position of alignment as it enters the right hand bush20, and as a result the bushing is reamed to a uniform diameter throughout its length.

In the embodiment illustrated the extension 22 has a sleeve portion 23 internally 25 threaded as at 24 and a reduced portion forming a pin 25. The construction is such that when the extension is to be applied to the type'of reamer shown in Fig. 1, the nut 15 may be removed and the extension B0 22 screwed on the threaded portion 12 in place of the nut. The expansible sleeve 21 may be variously constructed and may be made a part of the extension 22 or separate therefrom. ,In the present instance the sleeve 21 comprises an elongated collar 26 having an internal bore 27 to slidably receivc the reduced portion or pin 25 of the extension, and at one end of the collar is formed the tapered shoulder 28 while a nut 29 is threaded upon the other end of. the collar and has a similar tapered shoulder 30. A split cylinder 3l is mounted upon the collar 26 with its ends engaging the tapered shoulders 28, 30, and the cyllnder is expanded by tightening up the nut 29. The outer surface of the nut 29 is preferably knurled,as is also the opposite end of the .-collar 26.

The expansion sleeve 21v may be readily expanded to fit snugly within one ofthe bushings 20, where it-will serve to guide the.

reamer as it enters the other bushing, and the expansible sleeve may be ypushed forward by the reamer as it travels through the bushing in the reamingl operation.

When the aligned bushings are relatively close to eac-h other as in Fig. 7, it is unnecessary to provide a guiding bushing at the rear of the cutting portion of the 00 reamer, as the reamer will enter one bushing ybefore it clears the other, but if the bushings or holes to be reamed are spaced apart a distance greater than the length of the cutive ting face of the reamer, as is the case in Fig. 8, a rear expansible sleeve 32 is preferably provided. Theexpansible sleeve 32'may be constructed similar to the cxpansible'sleeve 21, except that the collar 33 is preferably internally threaded as at 34 to be screwed on the threader portion .13 of the reamer.. The split cylinder 35 is expanded similar to the split cylinder 31 In Fig. 8, 36 and 37 designate space plates or thelike having aligned holes therein that' are to be reamed, and in reaming these holes the guiding mechanism of Fig. 7 as well as that of Fig.

8 is preferably used, the nuts 15 and 16.

being replaced. bythe 'attachments In reaming the spaced plates 36 and 37, 'the forward guiding mechanism of Fig. 7 will engage the bore of the plate 36 and guide the reamer as lit enters the bore of plate 37, and the rear expansible sleeve 32 will engage'the bore of the plate 37 andl guide the reamer as it enters the bore of the plate 36.

The present invention may be given various embodiments other than herein disclosed without departing from the full scope of the 'same as defined by the claims.

,What is claimedis 1. An expansible reamer and guides for guiding the reamer in reaming aligned holes, comprising in comb-ination, a reamer body threaded at its ends to receive blade holding means, reamer blades mounted up- .the reamer body for adjustment longitudinally lof said body, a collar having threaded engagement with one threaded end of the reamer body and adapted to secure one end of the reamer blades in place, an expansible sleeve mounted on said collar, an extension having threaded engagement with the other threaded end of the body and adapted to secure the other end of the reamer bladesin place, and an expansion sleeve fitted upon said extension. n

2. An expansible reamer and guides for guiding the reamer in reaming aligned holes,

comprising in combination, a reamer body threaded at its ends to receive blade holding means,` reamer blades mounted upon lthe reamer body for adjustment longitudinally of said body and the blades and body having cooperating inclined surfaces for expanding the blades as they are forced iusA longitudinallyl of the body, a collar having threaded engagement with the rear threaded end of the reamer body and adapted to 'secure the rear ends of the reamer blades in place, an expansible sleeve upon said collar, an extensionv at the for- Ward end of the reamer body, andan expansion sleeve fitted upon said extension.

3. A n expansion Vreamer and guide for lil guiding the reamer in reaming alg-ned holes, comprising in combination, a reamer body provided with expansible reamer blades,

megns for expanding said blades, an exten- 5 sion projecting )from the forward end of the reamer body,an elongated collar fitted on said extension, a. cylinder surrounding said collar, and means for expanding the cylinder. l

In testimony whereof, I havel signed my l0 name to this specification.

ANTON M, YEDOE. 

